I've seen these floating around at gun shows. I bought a break-top in 38s&w so I could have some fun reloading for it and quick draw tournements if I can find any in the future.
I found a page that might be some help.
Smith & Wesson Handguns
It sounds like number 3 is your revolver. I'm assuming its a 5 shot revolver because most of that time were. If you have anymore info it would be easier to narrow it down to what you have.
While not catching a high price on the market, the break-tops are fun to have and if you can afford one I hear Uberti break-tops are pretty good guns.